PFS:Write, originally from Software Publishing Corporation and later sold to Spinnaker Software, was an early and easy to use word processor for the IBM PC and Apple II. It was also licensed by IBM as IBM Writing Assistant. It can exchange data between PFS:Graph, PFS:File, and PFS:Report. SPC later replaced PFS:Write with Professional Write. Early versions had no built in spell checker, and were instead used with PFS:Proof.